A suspected case of foot and mouth disease was found in Britain today, the Department of Environment, Food and Rural Affairs (DEFRA) said on its Web site.

The suspected case was found at a farm 30 miles from where an outbreak in August led to a mass slaughter of cattle stock, the agency said. A slaughter of cattle is underway at the site of the new suspected case.

Officials have set up a three-mile control zone, barring all animal movement around the affected area in Surrey, a county on the outskirts of London. (While horses cannot be infected by foot and mouth disease, they can carry the virus on their hooves, skin, hair, and possibly in their nasal passages. Restrictions on livestock transport during a foot and mouth disease outbreak could severely hamper the equine industry of a country.)

“The containment and eradication of foot-and-mouth disease is our top priority,” Britain’s Chief Veterinary Officer Debby Reynolds, BVSc, PhD, MRCVS, said in a statement.

She said the disease had not been confirmed and officials were awaiting the results of laboratory tests.

Prime Minister Gordon Brown will chair an emergency meeting of senior officials.

The August outbreak was centered near the government-funded Institute for Animal Health, a diagnostic laboratory, and Merial Animal Health, a British unit of the U.S.-French pharmaceutical firm Merial Ltd.

The laboratory uses live viruses for research, and Merial uses them to produce vaccines. Investigators believe the August outbreak originated from the site but was unable to determine whether it was from the government laboratory or Merial’s vaccine factory.

Farmers said another outbreak would be a catastrophe to the industry, which has suffered a series of blows in recent years.

“Indications are that this could be a positive test, and if that